Engine Sudden Misfire Situation
Thread Starter
|
Mountain Pass
Joined: Jun 2016
Posts: 207
Likes: 21
From: West Tennessee
Ok … so I ran a straight edge on the head and couldn’t see any gaps … I had a feeler gauge (.010) smallest i had, and couldn’t find a gap either …
so I pulled the passenger side head but I did not do a torque test as my torque wrench is at my storage 10 miles away … but same situation as the driver side that the short head bolts were almost loose and the longer bolts had good torque. I didn’t get a picture of the gasket as it was getting dark but the head gasket had signs of loosing good contact. This head did not pass my feeler gauge test as I was able to slip the .010 under my straight edge in several places. I’ll check the block tomorrow but I’m assuming that I should have the head’s shaved flat … new bolts recommended ? also ?
so I pulled the passenger side head but I did not do a torque test as my torque wrench is at my storage 10 miles away … but same situation as the driver side that the short head bolts were almost loose and the longer bolts had good torque. I didn’t get a picture of the gasket as it was getting dark but the head gasket had signs of loosing good contact. This head did not pass my feeler gauge test as I was able to slip the .010 under my straight edge in several places. I’ll check the block tomorrow but I’m assuming that I should have the head’s shaved flat … new bolts recommended ? also ?
Cargo Master
Joined: Oct 2020
Posts: 2,675
Likes: 784
Reusing the old bolts should not be a problem. When they are tightened they are supposedly tightened to about 80% of their yield strength. This means that while they do stretch when tightened they are not permanently elongated and theoretically they could be torqued over and over until the threads wore out without yielding. To me it sounds like the head gasket compressed more than it should have during heat cycling, enough that it made a noticeable difference in the clamping load when you took it apart. Then it blew out between the cylinders.
In my personal experience I've had excellent results from Engine Tech gaskets, all of their stuff really. But they do offer a regular and a heavy duty gasket for some applications including the 302.
In my personal experience I've had excellent results from Engine Tech gaskets, all of their stuff really. But they do offer a regular and a heavy duty gasket for some applications including the 302.
Thread
Thread Starter
Forum
Replies
Last Post
bad_idea
1987 - 1996 F150 & Larger F-Series Trucks
4
Sep 6, 2018 03:32 AM
Raymgriff
1987 - 1996 F150 & Larger F-Series Trucks
17
Mar 26, 2017 06:26 PM
